Bestjamibt s



B. B. FEUX.

RUBBER'MWNG MA' CHINE.

APPLICATION FILED NOV. IG,

` A lllllllli 1 erica.

RUBBER/MIXING MACHINE.

readies.

., of Illinois, having invented certain new and useful Improvements in Rubbe1'lix .ing Machines. of which the following is a specification.

illy invention relates to machines for 10 mixilrigl rubber compounds, .and the like,

andyhasfor its object the provision of siniple and etlicient mechanism for automatically and continuously mixing ingregilients for making raw rubber compounds, andthe like, and permitting the ingredients tog beadded at different stages 4of the miX- ingr, A further purpose is the provision Vof a mechanism which requiresl a minimum Iamountof labor to operator. Other objects 'will appear hereinafter.

4Anembodiment of my invention is shown inthe accompanying drawing forming a part of this specilication, and inWhich Figure 1 is a broken side elevation of a mixing machine embodying my invention; Figgis an enlarged longitudinal broken section of the same;

Fig. 3 is an enlarged longitudinal section showing details of cutting mechanism used in the device; and,

Fig. 4 is a sect-ion taken on line 4 4 of Fig. 3.

In the manufacture of raw rubber compounds, and the like, it is necessary to mix the ingredients making up such compounds very thoroughly in order to overcome their sticky qualities which causes them to adhere to the machine and inLerfere 'with their inixing'. This is especially true 40 of the rubber used in the compound. In

- the mixing of these ingr-clients, it is necessary to chop or cut the ingredients into very tine particles a number of times before they are sufficiently mixed to obtain the desired compounds. This entails considerable labor where the ingredients must be fed through a machine several times. To overcome this, I have provided a. machine in which the materials may be fed into the device, and automatically forced through a plurality of cutters so that when the materials lemerge from the machine, they are thoroughly mixed.

Specification of Letters Patent.

Patented Get. 28,` 1919.

Application led November 16, 1916. Serial No. 131,637.

. Referring more particularly to the drawing, I preferably provide a substantially tubular casing 5 long enough to house any desired number of. cutting and mixing mechanisms. In ordinary practice, I find that about ten mixing aud cuttingv mechanisms are desirable,however, this number may be increased or decreased as desired. The casing 5 is preferably made in an upper and lower half with a jacket (iV extending entirely around it tom provide a cooling' chamber 7 for the circulation of the cooling medium, such as water, to absorb heat produced by friction in the operation of the machine. The casing is preferably provided with a plurality of feed hoppers S in its upper half which communicate with the interior ofthe casing so that part of the materials or ingredients used in making` up the rubber compounds, and the like, may be fed into the casing at different positions therein and at different stages of the mixing. It will also be apparent that one or more of these hoppers may be used as desired, and when any one or more of the hopper-s are not used, then the materials will be. forced by such hopper or hoppers .by the conveyors, described later.

In the axis of the casing 5, I provide a shaft, 9 which carries a gear 10, meshing with a smaller or reducing gear, not shown, which is driven by a pulley 11 from a suitable source of power, not shown. The shaft 9 preferably extends entirely through the casing 5. On the shaft 9 is provided a plurality of conveyors, each of Which comprises a tubular center portion 12 with a spiral web or lin 13, which cooperates with the inner wall of the casing to force material through the latter. At the end of each conveyer, on the inner periphery of the easingY 5, I provide a circular 2frroove which is formed with a half in each part of the easing. In each of the grooves I provide a perforated disk 14 which forms a kind of partition separating the interior of the casing 5 into small compartments. Each disk 14is provided with an opening at its axis, in which an end portion of one of the conveyors is mounted. Such conveyor extends through said disk and is provided With a knife 15 rigidly secured thereto. The knife 15 is adapted to rotate with the conveyer against teils set forth, but desire to the perforated disk 14 and ooperate therewith to shear oi' thematerials as `they are fed by the conveyer through the perforations 16 of said disk 1d. The end of the conveyer which passes through a disk 14 is threaded, and e nut 17 is threaded' on said extended end of the conveyor for locking the knife 15 on the conveyer. A pin 18 is tted through the first conveyer and shaft 9 to lock such conveyer to the shaft. Each of the other conveyers is locked to its next adjacent conveyor by a slot and lug connection 19, such as is clearly indicated in Figs. and. lt will be apparent, however, that when so desired, pins 18 may also be used to secure the other eonveyers to said shaft 9.

In the operation of the device, a part of the material is preferably fed in the rst hopper 8 and forced through the lirst perforaed disk 1.4L where it is eut ofi' by the first knife 15 as it passes through the perforations 16 in said disk. lVhen the mate rial passes the first disk and knife, other portions of the ingredients may be added at the second hopper 8, and these ingredients een poss through the second disk 14 and vknife ln a .like manner, other parts of the ingredients may be added at the other hoppers S, as desired. When the ingredients emerge from the last disk 14, they are in the desired condition for vulcenizing or fur* ther 1n anipulation.

llVhile I have illustrated and described the preferred form of my invention, I do not desire to be limited 'to the precise deavail myself needles space between lthe feed openings with e half of each groove in each half of the easing; a perforated disk having;- its edge disposed in each circuler groove; a shaft extending through the eres of all of said disks and said casing; conveyers secured on said shaft between said disks; and e knife mounted on each `conveyer adjacent one oi" the disks and adapted to coperate with the latter to provide cutting and mir-:ing means.

2. A rubber mixing machine comprising a substantially tubular easing; of perforated disks mounted in said easing dividing the latter into a plurality of compartments disposed end to end; a shaft eX- tendinp; axially through all olif said com pertinents; e screw conveyer in each' of seid compartments having one end portion extending through one oi' said disks into an adjacent compartment; means securing one of said conveyers to seid shaft; and slot and lug connections between all of the oonveyers.

ln testimony whereof l have signed my neme to this speoiiication, on this 14th day of Noxieniher, A. D. 1916.

JMIN B. FELX.

a plurality 

